Total polyphenol (TPh) and flavonoid (Fla) contents of some commonly available plants and seeds derived from Central India were investigated spectrophotometrically using Folin-Ciocalteu and aluminum chloride as reagents. The TPh and Fla contents of tree barks (73), leaves (62), flowers (40), seed pods (11), seed coats (37), and seeds (227) were evaluated in the following ranges (unit g 100 g^-1): 0.15-5.30 and 0.11-4.2 for tree barks, 1.25-4.13 and 1.04-3.76 for leaves, 1.75-18.69 and 1.27-18.20 for flowers, 0.94-2.88 and 0.21-1.74 for seed pods, 0.18-5.11 and 0.10-4.23 for seed coats, and 0.01-5.00 and 0.01-4.47 for seeds. The concentrations of TPh and Fla were investigated in detail and cluster analysis was used to study the differential distributions. Polyphenol data sets of 450 plants as food supplement and nutrition sources were obtained.